/usr/share/doc/liblttctl-dev/changelog.Debian.gz is in liblttctl-dev 2.4.0-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/liblttctl-dev/../liblttng-ctl0/changelog.Debian.gz
/usr/share/doc/liblttctl-dev/../liblttng-ctl0/changelog.Debian.gz